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b24413180f
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
321 lines
8.1 KiB
C
321 lines
8.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* xtsonic.c
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*
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* (C) 2001 - 2007 Tensilica Inc.
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* Kevin Chea <kchea@yahoo.com>
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* Marc Gauthier <marc@linux-xtensa.org>
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* Chris Zankel <chris@zankel.net>
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*
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* (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de)
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*
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* This driver is based on work from Andreas Busse, but most of
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* the code is rewritten.
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*
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* (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de)
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*
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* A driver for the onboard Sonic ethernet controller on the XT2000.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/fcntl.h>
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#include <linux/gfp.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/in.h>
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#include <linux/string.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/platform_device.h>
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#include <linux/dma-mapping.h>
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#include <linux/slab.h>
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#include <asm/io.h>
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#include <asm/pgtable.h>
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#include <asm/dma.h>
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static char xtsonic_string[] = "xtsonic";
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extern unsigned xtboard_nvram_valid(void);
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extern void xtboard_get_ether_addr(unsigned char *buf);
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#include "sonic.h"
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/*
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* According to the documentation for the Sonic ethernet controller,
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* EOBC should be 760 words (1520 bytes) for 32-bit applications, and,
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* as such, 2 words less than the buffer size. The value for RBSIZE
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* defined in sonic.h, however is only 1520.
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*
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* (Note that in 16-bit configurations, EOBC is 759 words (1518 bytes) and
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* RBSIZE 1520 bytes)
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*/
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#undef SONIC_RBSIZE
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#define SONIC_RBSIZE 1524
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/*
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* The chip provides 256 byte register space.
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*/
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#define SONIC_MEM_SIZE 0x100
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/*
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* Macros to access SONIC registers
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*/
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#define SONIC_READ(reg) \
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(0xffff & *((volatile unsigned int *)dev->base_addr+reg))
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#define SONIC_WRITE(reg,val) \
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*((volatile unsigned int *)dev->base_addr+reg) = val
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/* Use 0 for production, 1 for verification, and >2 for debug */
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#ifdef SONIC_DEBUG
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static unsigned int sonic_debug = SONIC_DEBUG;
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#else
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static unsigned int sonic_debug = 1;
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#endif
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/*
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* We cannot use station (ethernet) address prefixes to detect the
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* sonic controller since these are board manufacturer depended.
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* So we check for known Silicon Revision IDs instead.
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*/
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static unsigned short known_revisions[] =
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{
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0x101, /* SONIC 83934 */
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0xffff /* end of list */
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};
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static int xtsonic_open(struct net_device *dev)
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{
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int retval;
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retval = request_irq(dev->irq, sonic_interrupt, 0, "sonic", dev);
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if (retval) {
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printk(KERN_ERR "%s: unable to get IRQ %d.\n",
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dev->name, dev->irq);
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return -EAGAIN;
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}
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retval = sonic_open(dev);
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if (retval)
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free_irq(dev->irq, dev);
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return retval;
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}
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static int xtsonic_close(struct net_device *dev)
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{
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int err;
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err = sonic_close(dev);
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free_irq(dev->irq, dev);
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return err;
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}
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static const struct net_device_ops xtsonic_netdev_ops = {
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.ndo_open = xtsonic_open,
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.ndo_stop = xtsonic_close,
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.ndo_start_xmit = sonic_send_packet,
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.ndo_get_stats = sonic_get_stats,
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.ndo_set_rx_mode = sonic_multicast_list,
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.ndo_tx_timeout = sonic_tx_timeout,
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.ndo_validate_addr = eth_validate_addr,
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.ndo_set_mac_address = eth_mac_addr,
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};
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static int __init sonic_probe1(struct net_device *dev)
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{
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static unsigned version_printed = 0;
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unsigned int silicon_revision;
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struct sonic_local *lp = netdev_priv(dev);
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unsigned int base_addr = dev->base_addr;
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int i;
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int err = 0;
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if (!request_mem_region(base_addr, 0x100, xtsonic_string))
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return -EBUSY;
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/*
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* get the Silicon Revision ID. If this is one of the known
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* one assume that we found a SONIC ethernet controller at
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* the expected location.
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*/
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silicon_revision = SONIC_READ(SONIC_SR);
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if (sonic_debug > 1)
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printk("SONIC Silicon Revision = 0x%04x\n",silicon_revision);
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i = 0;
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while ((known_revisions[i] != 0xffff) &&
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(known_revisions[i] != silicon_revision))
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i++;
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if (known_revisions[i] == 0xffff) {
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printk("SONIC ethernet controller not found (0x%4x)\n",
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silicon_revision);
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return -ENODEV;
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}
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if (sonic_debug && version_printed++ == 0)
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printk(version);
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/*
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* Put the sonic into software reset, then retrieve ethernet address.
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* Note: we are assuming that the boot-loader has initialized the cam.
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*/
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SONIC_WRITE(SONIC_CMD,SONIC_CR_RST);
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SONIC_WRITE(SONIC_DCR,
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SONIC_DCR_WC0|SONIC_DCR_DW|SONIC_DCR_LBR|SONIC_DCR_SBUS);
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SONIC_WRITE(SONIC_CEP,0);
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SONIC_WRITE(SONIC_IMR,0);
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SONIC_WRITE(SONIC_CMD,SONIC_CR_RST);
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SONIC_WRITE(SONIC_CEP,0);
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for (i=0; i<3; i++) {
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unsigned int val = SONIC_READ(SONIC_CAP0-i);
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dev->dev_addr[i*2] = val;
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dev->dev_addr[i*2+1] = val >> 8;
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}
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/* Initialize the device structure. */
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lp->dma_bitmode = SONIC_BITMODE32;
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/*
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* Allocate local private descriptor areas in uncached space.
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* The entire structure must be located within the same 64kb segment.
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* A simple way to ensure this is to allocate twice the
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* size of the structure -- given that the structure is
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* much less than 64 kB, at least one of the halves of
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* the allocated area will be contained entirely in 64 kB.
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* We also allocate extra space for a pointer to allow freeing
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* this structure later on (in xtsonic_cleanup_module()).
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*/
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lp->descriptors = dma_alloc_coherent(lp->device,
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SIZEOF_SONIC_DESC *
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SONIC_BUS_SCALE(lp->dma_bitmode),
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&lp->descriptors_laddr,
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GFP_KERNEL);
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if (lp->descriptors == NULL) {
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err = -ENOMEM;
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goto out;
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}
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lp->cda = lp->descriptors;
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lp->tda = lp->cda + (SIZEOF_SONIC_CDA
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* SONIC_BUS_SCALE(lp->dma_bitmode));
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lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
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* SONIC_BUS_SCALE(lp->dma_bitmode));
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lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
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* SONIC_BUS_SCALE(lp->dma_bitmode));
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/* get the virtual dma address */
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lp->cda_laddr = lp->descriptors_laddr;
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lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA
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* SONIC_BUS_SCALE(lp->dma_bitmode));
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lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
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* SONIC_BUS_SCALE(lp->dma_bitmode));
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lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
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* SONIC_BUS_SCALE(lp->dma_bitmode));
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dev->netdev_ops = &xtsonic_netdev_ops;
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dev->watchdog_timeo = TX_TIMEOUT;
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/*
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* clear tally counter
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*/
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SONIC_WRITE(SONIC_CRCT,0xffff);
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SONIC_WRITE(SONIC_FAET,0xffff);
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SONIC_WRITE(SONIC_MPT,0xffff);
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return 0;
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out:
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release_region(dev->base_addr, SONIC_MEM_SIZE);
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return err;
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}
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/*
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* Probe for a SONIC ethernet controller on an XT2000 board.
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* Actually probing is superfluous but we're paranoid.
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*/
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int xtsonic_probe(struct platform_device *pdev)
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{
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struct net_device *dev;
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struct sonic_local *lp;
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struct resource *resmem, *resirq;
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int err = 0;
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if ((resmem = platform_get_resource(pdev, IORESOURCE_MEM, 0)) == NULL)
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return -ENODEV;
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if ((resirq = platform_get_resource(pdev, IORESOURCE_IRQ, 0)) == NULL)
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return -ENODEV;
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if ((dev = alloc_etherdev(sizeof(struct sonic_local))) == NULL)
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return -ENOMEM;
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lp = netdev_priv(dev);
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lp->device = &pdev->dev;
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platform_set_drvdata(pdev, dev);
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SET_NETDEV_DEV(dev, &pdev->dev);
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netdev_boot_setup_check(dev);
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dev->base_addr = resmem->start;
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dev->irq = resirq->start;
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if ((err = sonic_probe1(dev)))
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goto out;
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if ((err = register_netdev(dev)))
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goto out1;
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printk("%s: SONIC ethernet @%08lx, MAC %pM, IRQ %d\n", dev->name,
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dev->base_addr, dev->dev_addr, dev->irq);
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return 0;
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out1:
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release_region(dev->base_addr, SONIC_MEM_SIZE);
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out:
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free_netdev(dev);
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return err;
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}
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MODULE_DESCRIPTION("Xtensa XT2000 SONIC ethernet driver");
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module_param(sonic_debug, int, 0);
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MODULE_PARM_DESC(sonic_debug, "xtsonic debug level (1-4)");
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#include "sonic.c"
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static int xtsonic_device_remove(struct platform_device *pdev)
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{
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struct net_device *dev = platform_get_drvdata(pdev);
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struct sonic_local *lp = netdev_priv(dev);
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unregister_netdev(dev);
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dma_free_coherent(lp->device,
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SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
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lp->descriptors, lp->descriptors_laddr);
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release_region (dev->base_addr, SONIC_MEM_SIZE);
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free_netdev(dev);
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return 0;
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}
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static struct platform_driver xtsonic_driver = {
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.probe = xtsonic_probe,
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.remove = xtsonic_device_remove,
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.driver = {
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.name = xtsonic_string,
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},
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};
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module_platform_driver(xtsonic_driver);
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